Portable toilet



FIG. 1 is a top plan view of a portable toilet showing our new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a front elevtional view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevational view thereof; and,

FIG. 6 is a rear elevational view thereof. 

The ornamental design for portable toilet, as shown and described. 